Improvement in sash-fastenings



UNITED STATES PATENT OEEICE.

F. M. HUBBARD, OF PROTECTION, NEW YORK.

IMPROVEMENT IN SASH-FASTENINGS.

Specification forming part of Letters Patent No. 38,392, dated May 5, 1863.

To @ZZ whom it may concern/.-

Beit known that I, F. M. HUBBARD, of Protection, Erie county, State of New York, have invented certain new and useful Improvements in Window-Stops; and I hereby declare that the following is a true and exact description -of the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon.

The object of my invention is the construction of a simple and effectual mode of fastening a window at any required degree of elevation, and when down to secure it in that position so that any one on the outside will iind it impossible to raise it.

Figure l in the drawings represents a vertii cal section of the casing and sash. Fig. 2 isa side view of the thumb-knob that operates the Wheels.

The casing A is' made in the ordinary way with a groove to receive the sash B.

C represents the metallic box containing the wheels.

g designates the driving-wheel, through the center of which the shaft k passes. To the end of 7a the knob e is attached..

rlhe drivin g-wheel g isformed with cogs which work in a cone-shaped projection on the upper side of the spring h. The object of this spring IL is to prevent by its pressure the drivingwheel g from moving too easily. On the same shaft with gis the small cog-wheel k in dotted lines. k is geared with the cam L, one side of which is furnished with cogs. The cam L works on the pivot n, and the side next to the casing is slightly concave at the center and rounded oft at the upper and lower ends, so as to form two circular projections, by the pressure of which against the casing the Wzndow may be retained at any point required.

In operating my stop the cam L is acted upon by the wheel k until a point is reached where the cogs on L terminate. k can then act no further as it is arrested by the part of L next the casing, and which acts as a latch. Opposite to the upper end ofthe cam is a cavity made to receive it, so that when the window is down it is immovable from the outside.

The stop is operated simply by turning the knob e to the right or left.

Having thus described my invention, what I claim, and desire secured by Letters Patent, 1s-

The driving-wheel g, the wheel 7c, the spring h, the cam-wheel L, and the knob e, the whole arranged in the manner and for the purpose substantially as setforth:

F. M. HUBBARD.

Witnesses:

A. LYEORD, S. C. CHENEY. 

